Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Technical Papers
Effect of Oxide Ion on the Electrodeposition of Tungsten in the ZnCl2-NaCl (60-40 mol %) Melt
Hideya TAKENISHIAkira KATAGIRI
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1999 Volume 67 Issue 6 Pages 669-676

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Abstract

The effect of oxide ion was investigated in the electrodeposition of tungsten in an acidic ZnCl2-NaCl (60-40 mol %) melt at 450 °C. Cyclic voltammetry was performed in melts which contained various tungsten compounds and different amounts of ZnO. In constant potential electrolysis, metallic tungsten was obtained from K2WO4, WO3, WOCl4, and WCl6, but not from KWCl6, K2WCl6, WCl4, K3W2Cl9 and WCl2. When ZnO was added, metallic tungsten deposited from KWCl6, K2WCl6, and WCl4. It seems that the oxide ion or an oxochlorotungsten species participates in the electrodeposition process.

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© 1999 The Electrochemical Society of Japan
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